And on a more scientifc note it is physically impossible for the GQ to be 70 000ly from Bajor, given that our galaxy is ~100 000ly wide.

Huh? 70,000 lightyear is less than 100,000 lightyears, so I don't see any impossibility here. Is this a reference to Star Trek cartography that I'm not aware of, or have forgotten? How's it impossible?

Ok I'll expand. Some parts of the GQ might be more than 70 000ly away. But at it's closest point to Bajor the GQ is far closer than 70 000ly away.

There is a difference between a specifc point and a general location.

Idran a star some 70 000 ly away from Bajor would be a specifc location. The GQ is a general location counting for 25% of the galaxy.

Or to put it in modern terms, pick a country/state other than your own and ask how far away is it, do you measure to the border or a specifc point within it?

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On the continent of wild endeavour in the mountains of solace and solitude there stood the citadel of the time lords, the oldest and most mighty race in the universe looking down on the galaxies below sworn never to interfere only to watch.